Apparatus for full-automatic, ultra-low pressure, fractionation-free and non-destructive extraction of water

Abstract

The invention provides a device for full-automatic, ultra-low pressure, fractionation-free and non-destructive extraction of water, including a control box, an extraction part, an ultra-low temperature cold trap and a transmission device, wherein the control box and the extraction part are located at the top of a cabinet, the ultra-low temperature cold trap is located inside the cabinet, a touch screen is arranged on the control box, a temperature control meter is arranged on a side face of the control box, the extraction part includes an upper layer plate, a middle layer plate, a bottom plate and a test tube, the bottom plate is fixedly installed on the cabinet, the test tube is accommodated in the ultra-low temperature cold trap, and the transmission device is fixedly installed on the bottom plate. The invention has the beneficial effects of being able to extract a plurality of samples at the same time, so the extraction efficiency is high; and no liquid nitrogen or organic solvent is required, thereby reducing the environmental pollution.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is the U.S. National Phase Application of PCT / CN2014 / 000916, filed Oct. 16, 2014, the content of which application is incorporated herein by reference in its entirety for all purposes.FIELD OF THE INVENTION[0002]The present invention relates to the field of experimental detection devices, and in particular to a device for full-automatic, ultra-low pressure, fractionation-free and non-destructive extraction of water.BACKGROUND[0003]With the deepening of ecological researches and environmental researches, the extraction and collection of plant water and soil water have been paid much attention by research institutions such as agriculture, forestry and environmental research institutes, however a perfect method for extracting the plant water and soil water has not been found yet, some of the existing technical methods require the use of liquid nitrogen cooling, while some employs toluene or xylene or the like as a solvent. I...

AI Technical Summary

Benefits of technology

[0007]The objective of the present invention is to overcome the defects of the traditional extraction technology and provide a device for full-automatic, ultra-low pressure, fractionation-free and non-destructive extraction of water, in order to fundamentally solve the problems of difficulty in extraction and collection of plant water and soil water, low automation degree and incapability of simultaneous collection and separation of a plurality of samples.

[0024]By means of the above-mentioned technical solutions, the foregoing device for full-automatic, ultra-low pressure, fractionation-free and non-destructive extraction of water of the present invention at least has the following advantages and beneficial effects: the device has the beneficial effects of being able to extract a plurality of samples at the same time, so the extraction efficiency is high; no liquid nitrogen or organic solvent is required, thereby reducing the environmental pollution; the extraction process is fully automatically controlled, thereby liberating manpower; non-destructive extraction of water can be realized so as to prevent isotope fractionation and ensure the extraction effect; and the system is designed in an integrated manner, so that the structure is compact and reliable. An ultra-low pressure separation system for extracting plant water and soil water in which the separation pressure is further reduced and compressor refrigeration is both safe and is not destructive to plants and soil structures is provided. The present invention achieves the rapid separation of water under the optimum temperature and pressure, controls the heating and cooling, controls the vacuum degree, realizes fully automatic control and completely non-destructive extraction of water and prevents isotope fractionation. Moreover, the damage to sample structures is prevented by using novel low temperature technology. The system designs built-in parameters by researching the correlation among the temperature, the vacuum degree and the required time, and uses different temperatures, vacuum degrees and extraction time to achieve water separation according to different sample types.

Problems solved by technology

In the traditional extraction methods, poisonous, harmful and expensive organic chemical reagents are used as solvents, which not only endangers the human health and the surrounding environment, and such used solvents are difficult to recycle, and this also has been the main reason of the high cost of plant extraction.

On the other hand, some people adopt the liquid nitrogen cooling mode, and liquid nitrogen needs to be manually added in the operation process, thereby the mode is cumbersome in operation, prone to nitrogen leakage and low in automation degree.

At present, although there are many water extraction methods, no corresponding matching product is available, the majority of laboratories assemble the products by using simple methods, so that the operation of the equipment is not reliable, and safety is relatively low.

In a water extraction process, the extraction time of different types of samples are not the same, the used temperatures are different, but no one has done relevant research.

The majority of samples for water extraction are collected from the field, the sample amount is limited, water separation failure is often caused by air leakage of connection, and accordingly the samples cannot be used again.

As the sample amount is relatively large, the manual operation efficiency is low.

Therefore, the existing plant water and soil water extraction equipment and methods have obviously inconvenience and defects on structures and use, and need to be further improved urgently.

In order to solve the problems, relevant manufacturers work hard to seek solutions, but no applicable design has been completed all the time, and general products have no suitable structure to solve the above problems, which is apparently the problem to be solved by relevant manufacturers urgently.

Images